package String;

public class SubstringDemo {
    public static void main(String[] args) {


        String str = "www.baidu.com";
        int start = str.indexOf(".") + 1;
        int end = str.lastIndexOf(".");
        int en = str.indexOf(".", start);
        String name = str.substring(start, end);
        System.out.println(name);

    }
}